Preparation method and application of bovine umbilical cord active ingredient extracting solution
A technology of active ingredients and extracts, applied in the field of biological skin care, can solve problems such as allergies, and achieve the effect of simple preparation, beneficial nutrition and repair, and low cost
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[0025] Specifically, the invention discloses a method for preparing an extract of bovine umbilical cord active ingredients, which specifically includes:
[0026] Pulverization and homogenization step: wash the fresh bovine umbilical cord with pre-cooled saline, mechanically pulverize it in pre-cooled saline, and homogenize again after washing; for example, homogenize at a temperature of 4°C;
[0027] The crushing and extraction step: the homogenate is crushed by cryo-ultrasound, frozen overnight, centrifuged to take the supernatant, and filtered through a filter membrane to obtain the extract liquid stock solution containing the active ingredient of the bovine umbilical cord.
[0028] Further, there is also a concentration adjustment step: adjusting the stock solution concentration of the extract to 0.1 mg / ml.
[0029] For example, the protein concentration of the prepared bovine umbilical cord active ingredient extract can be measured by ultraviolet spectrophotometer method, ...
Embodiment 1
[0032] Embodiment 1: Preparation of bovine umbilical cord active ingredient extraction stock solution
[0033] Take 250g of fresh bovine umbilical cord, add 500ml pre-cooled normal saline to wash twice, add 500ml pre-cooled normal saline, perform mechanical crushing at 4°C, add 500ml pre-cooled normal saline to wash twice, add 1000ml pre-cooled normal saline, Homogenize at 4°C, sonicate at 4°C, freeze overnight at -80°C, centrifuge at 4°C (3600rpm×10min), take the supernatant, and filter with a 0.22μ filter membrane to obtain the bovine umbilical cord active ingredient extract stock solution.
Embodiment 2
[0034] Embodiment 2: the preparation of bovine umbilical cord active ingredient extract
[0035] Initialize the UV spectrophotometer, preheat it for 30 minutes, and use normal saline as a blank for calibration. Pour the prepared bovine umbilical cord active ingredient extraction stock solution into a quartz cup and place it in the sample cell. Read the samples at A260 and A280 respectively. Absorbance value (A280=0.418, A260=0.314 in this example), the protein concentration of the stock solution was calculated according to the formula=1.45×A280−0.74×A260=0.374mg / ml.
[0036] According to the calculated protein concentration, the bovine umbilical cord active ingredient extraction stock solution is diluted, and its final concentration is determined to be 0.1 mg / ml, which is the bovine umbilical cord active ingredient extraction solution. Taking the concentration in this example as an example, the dilution method is to take 100ml of the bovine umbilical cord active ingredient ext...
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